Ime not difficult. At my lfs, when I worked there the aros ate readily. And I kept one silver and he ate within a week. Aros like calm waters. Growth rate varies from species to species. With a black I'd say 1-2" a month. With a lei and jar 1" a month.
I agree with Aquanero there is a lot of theories but here is mine the Aro is built for the surface, and in the wild they are focused on what's above, but in the aquarium they are forced to look down especially if they have to eat off of the substrate. I'm going to stick to this no matter what others say lol
Check locally too, In my area silvers turn up on craigslist pretty often. Usually people buy these cute little babies and then realize they cant prperly house them. Seems like most are around 16" - 18" when they figure that out, lol. Like anything else some think they are worth way too much and others sell at a reasonable cost.
